Combined transmission and differential gear.



U. M. LEBGH.

nomamnn TRANSMISSION AND DIFFERENTIAL GEAR,

APPLICATION FILED BBQ-18.1909.

Patented Dec. 6,- 1910.

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APPLIOATION'PILED DBG.18.1909.

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APPLICATION FILED DEU.18.190 9.

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CHARLES M. LEECH,- F LIMA, OHIO.

COMBINED TRANSMISSION AND DIFFERENTIAL GEAR.

eraser.

To all whom it may concern:

Be it known that 1, CHARLES M. LEECH, a citizen of the United States,residing at Lima, in the county of Allen and State of Ohio, haveinvented certain new and useful Improvements in Combined Transmissionand Differential Gear, of which the following is a specification.

My invention relates to a combined transmission and differential gear.

An important object of my invention is to provide a device of the abovecharacter, which is controlled by a single lever.

A further object of my invention is to provide acombined transmissionand diflerential gear, which may be constructed to occupy a relativelysmall space, and which will be reliable in its operation.

My invention consists generally in the arrangement and combination ofparts to be hereinafter described.

In the accompanying drawings, forming a part of this specification, andin which like.

numerals are used to designate like parts throughout the same, Figure 1is a fragmentary side elevation of my device, partly in section, Fig. 2is a horizontal sectional view of the same, Fig. 3 is a cross-sectionalview taken on line 33 of Fig. 1. Fig. 1 is a fragmentary side elevationof the controlling lever and associated members.

In the preferred embodiment of my invention, as illustrated in theaccompanying drawings, 1 designates the driving shaft of a motor vehiclewhich is rotated by any suitable form of engine (not shown). The drivingshaft 1 is provided with spaced pinions 2 and 3 which are rigidlysecured thereto by any suitable means. The pinions 2 and 3 mesh withlarger pinions 4 and 5 respectively, which in turn are rigidly mountedupon shafts 6 and 7 respectively. The shafts 6 and 7 are parallel to thedriving shaft 1 and have their inner ends rotatably mounted as at 8,within a fixed support 9. The support 9 is provided with a flanged end10, which is rigidly secured by means of bolts 11 to the central portionof a casing 12.

The support 9 and casing 12 are provided with registering cylindricalopenings 13 and 1 1, within which is rotatably mounted a cylindricalsleeve 15. \Vithin the cylindrical sleeve 15 is loosely mounted astationary cylindrical shaft 16, which may serve as a rear axle for thevehicle, or a transverse driving shaft for a chain drive vehicle.

Specification of Letters Patent.

Application filed December 18, 1909.

Patented Dec. 6, 1910.

Serial No. 533,792.

Within the casing 12, a friction disk 17 is rotatably mounted upon thesleeve 15 as at 18, and said friction disk 17 is bent at its centralportion to form a recess within which is disposed a bevel gear 19, whichis loosely mounted upon the sleeve 15 and rigidly connected to thefriction disk 17 by means of bolts 20. The bevel gear 19 slidablyengages the support 9 and is disposed to mesh 1 with a bevel gear 20which is loosely mounted upon the shaft 7 near its inner end. Keyed uponthe shaft 7 as at 21 is a clutch head 22 provided upon its inner endwith a clutch face 23, which is adapted to cooperate with acorresponding clutch face 2 1 formed upon the outer end of the bevelgear 20. It is obvious by this construction that the clutch head 22 isrotated by the shaft 7 and is capable of moving longitudinally of saidshaft 7 for engagement with the pinion 20, whereby said pinion may berigidly locked to the shaft 7. The clutch head 22 is provided with aperipheral groove or recess 25 within which is loosely mounted a ring26, upon the upper side of which is formed an upstanding arm 27 providedwith an enlarged apertured head 28, which is loosely mounted upon thedriving shaft 1. The arm 27 together with its head 28 is movedlongitudinally of the shaft 1 by means to be hereinafter described. Theshafts 6 and 7 are arranged in the same horizontal plane with the shaftor axle 16, and the shafts 6 and 7 are arranged in front of the frictiondisk 17 and extend diametrically of the same. Upon the shafts 6 and 7are keyed as at 29 and 30 beveled frictional pulleys designated as awhole by the numerals 31 and 32 respectively. The friction pulleys 31and 32 engage the friction disk 17 near its periphery and atdiametrically opposite points. The friction pulley 31 comprises acylindrical sleeve 33 which is slidably mounted upon the shaft 6 andprevented from rotating upon the same by means of the key 29. The sleeve33 is provided at its inner end with a circumferential flange 34:. Uponthe sleeve 33 is arranged a collar 35 provided at one end with a flange36, and said collar carries a beveled ring shaped section 37 which formsthe periphery of the pulley. The inner end of the collar 35 is screwthreaded as at 38 for the reception of a ring-shaped plate 39, which isconnected to the flange 36 by means of bolts 40. The ring-shaped section37 and the collar are both rigidly connected to the sleeve 33 by meansof screws 41. A ring 42 is loosely mounted upon the inner portion of thesleeve 33 and engages the flange 34 of the sleeve 33. The ring 42 hasformed upon its upper side an upstanding arm 43 provided upon its upperend with an apertured head 44, which is loosely mounted upon the driwing shaft 1. By this construction it is obvious that the pulley 31 maybe moved into and out of engagement with the friction disk 17, by movingthe arm 43 longitudinally of the driving shaft 1. The means for causingsuch movement of the arm 43 will be described hereinafter. Thefrictionpulley 32 comprises a tubular casing 45 which is mounted uponthe shaft 7 and keyed thereto as at 30, whereby said sleeve 45 iscapable of moving longitudinally of the shaft 7 and to be rotated bysaid shaft. Upon the sleeve 45 is arranged a collar 47 having an outerflanged end 48. The collar 45 carries a bevel ring shaped section 49which forms the periphery of the pulley 32, said section 49 beingprevented from displacement by means of a ring shaped plate 50 which isscrew-threaded as at 51 upon the inner end of the collar 47. The ringshaped plate 50 is connected to the flange 48 by means of bolts 52. Thecollar 45 is provided at its outer end with a circumferential flange 53near which is arranged a ring 54, which is loosely mounted upon thesleeve 45 and is pivotally connected as at 55 to a connecting rod 56..

The casing 12 is provided upon its side adjacent the friction disk 17with a centrally arranged circular opening, within which is disposed acylindrical casing 57 having its inner end partially closed by acircular flange 58 which is bolted as at 59 to the friction disk. Thecasing 57 is pro vided at diametrically opposite points with apcrturedbosses, within which are arranged thereduced ends 60 of trunnion bolts61. The reduced ends 60 are provided with nuts 62 which securely clampthe trunnion bolts to the bosses. Upon the trunnion bolts 61 arerotatably mounted bevel gears 63, which are prevented from havinglongitudinal movement upon said trunnion bolts, by means of the enlargedheads 64 formed upon the inner end of said trunnions 61. The bevel gears63 mesh with a larger bevel gear 65 which is rigidly mounted upon theinner end of the sleeve 15. The bevel gears 63 further mesh upon theiropposite sides with a corresponding bevel gear 66 which is rigidlymounted upon a tubular sleeve 67, loosely mounted upon the axle 16. Thebevel gears 63 and bevel gears 65 and 66 constitute a differential gearmechanism which is adapted to cooperate with the friction disk 17 andits associated members. It is to be understood that the rear wheels ofupon upon a fixed shaft 69. The controlling lever 68 is provided with alatch device 70 adapted to cooperate with a segmental rack '71 providedwith notches 72, 73, 74 and 75, termed, reverse, neutral, forward lowspeed, and forward high speed. A stripped pinion 76 is rigidly connectedto the lower end of the controlling lever 68 and is adapted to bepartially rotated when said lever 68 is oscillated. Upon the oppositesides of the stripped pinion 76, are arranged stripped pinions 77 and'78which mesh with the pinion 76 at diametrically opposite points and areadapted to be partially rotated by said pinion 76. The pinion 77 isprovided with a depending lever 79 which is rigidly secured thereto, andthe pinion 78 has rigidly secured thereto a depending lever 80. Thelevers 79 and 80 are pivotally connected as at 81 and 82 to connectingrods 83 and 84 respectively. The connecting rod 83 is pivotallyconnected as at 85 to a lever 86 which is pivotally connected near itscenter as at 87, to a stationary support 88 which is formed upon theupper side of the support 9. The lower free end of lever 86 is pivotallyconnected as at 89 to a connecting rod 90, which is pivotally connectedat 91 to the arm 43, which is adapted to move the reverse frictionpulley 31. The connectinQ' rod 84 is pivotally connected at 92 to a bellcrank lever 93 which is pivotally mounted upon a trunnion 94, which isfixed to the casing 12. The longer arm 95 of the bellcrank lever 93 ispivotally connected at 96 to rod 56, the forward end of which ispivotally connected at 55 to the ring 54, which is adapted to move theforward low speed friction pulley into engagement with the frictiondisk. .The bel l-crank lever 93 is provided at its apex with a short arm99, to which as at 100 is pivotally connected a rod 101, which has itsopposite end pivotally connected at 102 to the upstanding arm 27, whichmoves the clutch head 22.

In the operation of my device, when the controlling lever 68 is arrangedso that its latch device is disposed within the neutral notch 73, thefriction pulleys 31 and 32, will be out of engagement with the frictiondisk clock-wise and the levers S0 and 7 9 will accordingly be oscillatedforwardly. The lever 79 will draw the connecting rod 83 forwardly whichwill in its turn swing the lever 86 upon its pivot and move the reversefriction pulley 31 farther away from the friction disk 17. At the sametime the connecting rod 8 1 will swing bell-crank lever 93 forwardly andthe arm 95 of said bell-crank lever, by means of the connecting rod 56,will urge the forward low speed friction pulley 32 into engagement withthe friction disk 17; The lever 99 will also move the connecting rod 101rearwardly for advancing the clutch head 22 toward the pinion 20. Theclutch head 22 has a much greater distance to travel for engagement withthe bevel gear 20 than the pulley 32 has to travel before said pulley 32engages said friction disk 17 and therefore the clutch head 22 will bemoved toward but not into engagement with the gear 20, when thecontrolling lever 68 is moved to the forward low speed notch 74. Whenthe lever 68 is oscillated forwardly still farther so that the latchengages the forward high speed notch 75, the connecting rod 83 willaccordingly be moved forwardly a greater distance and the reversefriction pulley 31 will be moved still farther away from the frictiondisk. At the same time the connecting rod 84 will be moved forwardly forswinging the bellcrank lever 93 forwardly again. The arm 95 of thebell-crank lever will draw the connecting rod 56 rearwardly until saidarm 95 reaches its rearmost point of travel when the same will beoscillated forwardly and the forward low speed friction pulley 32 willbe moved forwardly upon the shaft 7 out of engagement with the frictiondisk. At the same time the arm 99 will move connecting rod 101rearwardly which will in turn move the clutch head 22 into engagementwith the bevel gear 20 for locking said bevel gear 20 to the shaft 7,whereby the friction disk 17 will be driven at forward high speed. lVhenthe lever 68 is moved rearwardly to the reverse notch 72, it is obviousthat the reverse friction pulley 31 will be urged into engagement withthe friction disk 17, and at the same time the forward low speedfriction disk 32 will be disengaged from the friction disk and theclutch head 22 moved away from the pinion 20.

When the friction disk 17 is driven by the reverse friction pulley orthe forward low speed friction pulley or the forward high. speed bevelgear 20, it is obvious that said friction disk carries with it thecasing 57, which constitutes a portion of the differential gearmechanism above described. The rotation of the casing 57 will beimparted by means of the bevel gears 63 to the bevel gears 65 and 66,which are adapted to rotate the sleeves 15 and 57 respectively. It willthus be seen that normally the sleeves 15 and 67 will be rotated at thesame rate of speed. However, should the sleeve 15 be positivelyprevented from rotating, and the sleeve 67 be free to rotate, saidsleeve 67 would then rotate twice as fast as before.

Having fully described my invention what I claim is 1. In a device ofthe character described, a driving shaft, a rotary disk, driven shaftsarranged in end to end relation to each other near said disk, meanscarried by the driven shafts for alternately engaging the disk toactuate the same in opposite directions, and connecting means betweenthe driving and driven shafts.

2. In a device of the character described,

a driving shaft, a rotary disk, driven shaftsarranged in end to endrelation to each other upon the same side of said disk, connecting meansbetween the driving and driven shafts, and means connected to the drivenshafts to engage the disk at substantially diametrically oppositepoints.

3. In a device of the character described, a driving shaft, a rotarydisk, driven shafts arranged in end to end relation to each other uponthe same side of said disk, connecting means between the driving anddriven shafts, means connected to the driven shafts to engage the diskat substantially diametrically opposite points, and adifferential gearmechanism connected to said disk.

4. In a device of the character described, a driving shaft, a rotarydisk, driven shafts arranged in end to end relation to each other uponthe same side of said disk, connecting means between the driving anddriven shafts, and means keyed upon the driven shafts to engage saiddisk at substantially diametrically opposite points.

5. In a device of the character described, a driving shaft a rotarydisk, driven shafts arranged in end to end relation to each other,connecting means between the driving and driven shafts, means keyed uponthe driven shafts to engage the disk at substantially diametricallyopposite points for actuating the same in opposite directions, and meansfor moving said means longitudinally of the driven shafts.

6. In a device of the character described, a drivingshaft, a rotarydisk, driven shafts arranged in end to end relation to each other nearsaid disk, means carried by the driven shafts for alternately engagingthe disk at substantially diametrically opposite points to actuate thesame in opposite directions, connecting means between the driving anddriven shafts, and a difierential gear mechanism mounted upon said disk.

7. In a device of the character described, the combination with adriving shaft, of shafts adapted to be driven by said driving shaft, adisk arranged in co'ciperative rela- &

tion to said shafts, friction pulleys keyed upon said shafts and adaptedto be urged into engagement with said friction disk, a bevel gearrigidly mounted upon said disk, a second bevel gear loosely mounted uponone of said shafts, a clutch mechanism for locking said last named bevelgear to its shaft, a controlling lever having connecting means with saidfriction pulleys and said clutch device whereby said friction disk maybe driven alternately by either of said friction pulleys and by saidlast named bevel gear, and a differential gear mechanism connected tosaid friction disk.

8. The combination with a driving shaft, provided with pinions, of aplurality of shafts provided with pinions meshing with said first namedpinions, a friction disk provided with a bevel gear rigidly securedthereto, arranged in operative relation to said plurality of shafts,friction pulleys keyed upon said last named shafts and adapted to engagesaid friction disk, a bevel gear loosely mounted upon one of said shaftsand arranged to engage said first named bevel gear, a lever pivotallymounted near its middle on a fixed support and having one end connectedto one of said friction pulleys, a bell-crank lever pivotally mountedupon a fixed support and pivotally connected to the other of saidfriction pulleys, a clutch mechanism for locking said last named bevelgear toits shaft, means connecting said clutch mechanism to saidbellcrank lever, connecting rods pivotally connected to said bell-cranklever and said lever pivotally mounted near its center, and acontrolling lever having means connected thereto and to said connectingrods for moving said connecting rods in the same direction.

9. In a device of the character described,

the combination with a driving shaft, of V a plurality of shafts drivenby said driving shaft, a disk arranged in operative relation to saidplurality of shafts, said plurality of shafts being arrangeddiametrically of said disk, means arranged upon saidplurality of shaftsfor alternately driving said disk in opposite directions and at high andlow speeds, and a differential gear mechanism connected to said disk.

In testimony whereof I aflix my signature in presence of two witnesses.

CHARLES M. LEEOH. l/Vitnesses:

NELLIE HOOVER, F. C. DALZELL.

